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cmake: support optional argument for overriding default ctag excludes 

so instead of excluding all submodules, one can just exclude boost and
rocksdb using:

  cmake -DCTAG_EXCLUDES="boost;rocksdb" ..

Signed-off-by: Kefu Chai <kchai@redhat.com>
This commit is contained in:
Kefu Chai 2017-04-07 11:55:10 +08:00
parent 57b45024f6
commit e1991238e7
2 changed files with 41 additions and 24 deletions
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7
CMakeLists.txt
View File

@ -614,3 +614,10 @@ if(WITH_SYSTEMD)
endif()
include(CTags)
option(CTAG_EXCLUDES "Exclude files/directories when running ctag.")
add_tags(ctags
SRC_DIR src
TAG_FILE tags
EXCLUDE_OPTS ${CTAG_EXCLUDES}
EXCLUDES "*.js")
add_custom_target(tags DEPENDS ctags)

58
cmake/modules/CTags.cmake
View File

@ -1,27 +1,37 @@
find_program(CTAGS_EXECUTABLE ctags)
if(CTAGS_EXECUTABLE)
set(src_dir "src")
set(tag_file ${src_dir}/tags)
execute_process(
COMMAND git config --file .gitmodules --get-regexp path
COMMAND awk "/${src_dir}/ { print $2 }"
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
OUTPUT_VARIABLE submodules
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REPLACE "\n" " " submodules ${submodules})
string(REPLACE "${src_dir}/" "--exclude=" excludes ${submodules})
# cmake will quote any embedded spaces when expanding ${excludes}
# in the command below, so, turn ${excludes} into a cmake List (separated
# by semicolons) to let the expansion below simply replace them with spaces
# again.
separate_arguments(excludes UNIX_COMMAND ${excludes})
add_custom_target(ctags
COMMAND ${CTAGS_EXECUTABLE} -R --c++-kinds=+p --fields=+iaS --extra=+q --exclude=*.js ${excludes}
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/${src_dir}
COMMENT "Building ctags file ${tag_file} (no submodules)"
function(add_tags name)
cmake_parse_arguments(TAGS "" "SRC_DIR;TAG_FILE" "EXCLUDE_OPTS;EXCLUDES" ${ARGN})
set(excludes ${TAGS_EXCLUDES})
if(TAGS_EXCLUDE_OPTS)
# always respect EXCLUDES_OPTS
list(APPEND excludes ${TAGS_EXCLUDE_OPTS})
else()
# exclude the submodules under SRC_DIR by default
execute_process(
COMMAND git config --file .gitmodules --get-regexp path
COMMAND awk "/${TAGS_SRC_DIR}/ { print $2 }"
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
OUTPUT_VARIABLE submodules
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REPLACE "${TAGS_SRC_DIR}/" "" submodules ${submodules})
# cmake list uses ";" as the delimiter, so split the string manually
# before iterating in it.
string(REPLACE "\n" ";" submodules ${submodules})
list(APPEND excludes ${submodules})
endif()
message(STATUS "exclude following files under ${TAGS_SRC_DIR}: ${excludes}")
# add_custom_target() accepts a list after "COMMAND" keyword, so we should
# make exclude_arg a list, otherwise cmake will quote it. and ctags will
# take it as as a single argument.
foreach(exclude ${excludes})
list(APPEND exclude_args --exclude=${exclude})
endforeach()
add_custom_target(${name}
COMMAND ${CTAGS_EXECUTABLE} -R --c++-kinds=+p --fields=+iaS --extra=+q ${exclude_args}
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/${TAGS_SRC_DIR}
COMMENT "Building ctags file ${TAGS_TAG_FILE}"
VERBATIM)
add_custom_target(tags
DEPENDS ctags)
set_source_files_properties(${CMAKE_SOURCE_DIR}/${tag_file} PROPERTIES
set_source_files_properties(${CMAKE_SOURCE_DIR}/${TAGS_TAG_FILE} PROPERTIES
GENERATED true)
endif(CTAGS_EXECUTABLE)
endfunction()